Mercury allows you to edit a section of HTML directly in the web browser through a WYSIWYG editor. Here I show how to integrate Mercury into a Rails app and save the changes back to the database.
(11 minutes)

Mustache is a simple, logic-less templating language which allows you to use the same template for both Ruby and JavaScript. See how to set it up with a custom template handler in this episode.
(17 minutes)

Few things are worse than seeing a "Something went wrong" 500 error on your production application. Here I show how to be notified when this happens using exception_notification and mention several other alternatives.
(6 minutes)

If you ever need to test an application which communicates with an external API, VCR is the way to go. Here I show a workflow in RSpec, how to use with capybara-mechanize, how to add sanitization filtering, and more.
(13 minutes)